You will learn
- Define parallel circuit.
- Compare brightness.
- Explain independence.
- Compare series and parallel.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- Parallel has branches.
- Each branch gets full voltage.
- Bulbs stay bright.
- One branch breaking does not stop others.
Words to know
components on separate branches
a separate path for current
where branches split or join
not depending on others
1. Discover: The house lights
In a house, the kitchen light goes off but the living room light stays on. “Houses are wired in parallel,” says Mr Tetteh. “Each light has its own branch, so turning one off or a bulb failing does not affect the others.”
Think: Why would homes not use series wiring?
2. Understand: Parallel
Idea 1: Branches
A parallel circuit has separate branches from the cell. Current splits at a junction and joins again.
Idea 2: Brightness
Each branch gets the full voltage of the cell, so bulbs on different branches are as bright as a single bulb. The cell supplies more total current and may drain faster.
Idea 3: Independent
Each branch works independently: if one bulb breaks, the others stay lit, and each can have its own switch.
3. Worked examples
Example 1 (I show you): Compare
Series and parallel.
- Loops.
- Brightness.
- Break.
Answer: Table.
Example 2 (We do it together): Predict
One bulb removed.
- Parallel.
- Others stay.
- Bright.
Answer: Others stay on.
Example 3 (You try): Draw
Parallel.
Show the steps and answer
- Cell.
- Two branches.
- Bulbs.
Answer: Diagram.
Did you know?
Mains wiring in houses worldwide uses parallel circuits so devices work independently; that is why mains is much more dangerous and must never be touched.
Why this matters
Parallel wiring lets us switch devices on and off independently.
4. Explore: Parallel bulbs
Build a parallel circuit with two bulbs from one 1.5 V cell, compare brightness with series and test removing one bulb.
- Build series first.
- Build parallel.
- Compare brightness.
- Remove a bulb.
Think about it: what did you notice?
What did you notice? Parallel bulbs were brighter and independent.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- A ___ circuit has separate branches.
- A ___ is a separate path.
- A ___ is where paths split.
- An ___ part does not depend on others.
Guided practice
Question 1. What is parallel?
Branches.
Question 2. What is a branch?
Separate path.
Question 3. What is a junction?
Split point.
Independent practice
Level 1: Start
- What is parallel?
- What is a branch?
- What is a junction?
- Is brightness same?
- One break?
Level 2: Grow
- Why bright?
- Why independent?
- Why houses parallel?
Level 3: Stretch
- Build.
- Compare.
- Explain.
Answers are in the answer key below. Try first, then check.
6. Apply: Science in everyday life
Compare series and parallel circuits.
Show a sample answer
Give two differences.
Another one. Tell a family member one thing from this lesson. Use the words you learned.
Show a sample answer
A clear sentence that uses at least one word from Words to know.
7. Common mistakes
Fix: Full voltage each.
Fix: Others stay.
8. Lesson summary and revision card
- I can define parallel circuit.
- I can compare brightness.
- I can explain independence.
- I can compare series and parallel.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- Parallel has branches.
- Each branch gets full voltage.
- Bulbs stay bright.
- One branch breaking does not stop others.
11. Next lesson
Next lesson: Conductors. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- Define parallel circuit and junction. [2 marks]
- Compare series and parallel. [4 marks]
- Draw a parallel circuit with two bulbs. [2 marks]
- Safety rule. [2 marks]
Total: 10 marks.
Marking guide and model answers
- 1 each
- Loops [1]; brightness [1]; break [1]; example [1]
- Branches [1]; cell [1]
- Any [1]; reason [1]
Score guide: 9 to 10 = secure. 6 to 8 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- What is parallel?
- What is a branch?
- What is a junction?
- Is brightness same?
- One break?
- Why bright?
- Why independent?
- Why houses parallel?
- Build.
- Compare.
Homework
Draw how a house could have lights on separate switches.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is parallel? | Branches. | 1 |
| 2. What is a branch? | Separate path. | 1 |
| 3. What is a junction? | Split point. | 1 |
| 4. Is brightness same? | Yes. | 1 |
| 5. One break? | Others stay. | 1 |
| 6. Why bright? | Full voltage. | 1 |
| 7. Why independent? | Own branch. | 1 |
| 8. Why houses parallel? | Independent devices. | 1 |
| 9. Build. | Circuit. | 1 |
| 10. Compare. | Table. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Branches.; 2 Separate path.; 3 Split point.; 4 Yes.; 5 Others stay.. Level 2: 1 Full voltage.; 2 Own branch.; 3 Independent devices.. Level 3: 1 Circuit.; 2 Table.; 3 Sentence..
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Define parallel circuit | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 Compare brightness | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Explain independence | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Compare series and parallel | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: “Parallel bulbs share the voltage.” Full voltage each.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Compare series and parallel.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
For parents and guardians
In this lesson your child builds parallel circuits with safe cells. You do not need to be an expert to help.
- Talk about home lights.
- Ask “Why independent?”
- Never touch sockets.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: define parallel circuit; compare brightness; explain independence; compare series and parallel.
Prerequisite knowledge. Grade 5 ideas: simple circuits, conductors and insulators, and magnets.
Materials. Cells, bulbs, wires. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Check cells.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Switch off one classroom light and ask, “Why do others stay on?”
Explanation (10 min). Teach parallel.
Guided activity (10 min). Learners build.
Independent activity (10 min). Learners compare.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. How many paths? Are bulbs equally bright?
Teacher explanation notes. Start with real objects and safe, hands-on observation. Then talk about what was seen, then draw and write. Always say “how do you know?”. Keep to the safety notes, and use local, safe materials.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use real objects and pictures, short sentences and a partner. Let learners point, show or draw instead of writing. Extension. Ask learners to find a new example at home and explain how they know.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. “Parallel bulbs share the voltage.” Full voltage each.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 10-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Compare series and parallel. Enrichment. Look for one new example near your home or school, draw it and explain it to someone. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: Next Generation Science Standards, Cambridge Primary Science and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Research used to shape this lesson. Courseversity Science curriculum, Grade 6 Unit 7, topic 5; Next Generation Science Standards, energy and forces; Cambridge Lower Secondary Science, physics; IB Primary Years Programme, how the world works. These sources informed the lesson.